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To Dave Bohlen CW filter.


 

I dont know how to send a private message on here, so this is the only way.

Dave How much do you want for the 600HZ cw filter?? I discovered that the SSB filter will not cut it in CW mode. Or Do you know how to force the filter I have to increase its band pass ??

Bob KH2BR


 

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Not sure I follow Bob. Did you strap the SSB filter to the CW filter slot on the filter board? I actually have a mod to ?select all there filters on the front panel but it’s a lot of work. AM filter 250! Ouch. But CW filters are common 25 bucks. I have plenty. When you select CW do you get IF noise? If it goes dead then all you need to do is strap the SSB filter in. I do enjoy a CW filter but have no problem using SSB filter on CW.
73
Dave

On Jun 3, 2024, at 2:29 PM, Robert Holsti via <kh2br.w6@...> wrote:

I dont know how to send a private message on here, so this is the only way.

Dave How much do you want for the 600HZ cw filter?? I discovered that the SSB filter will not cut it in CW mode. Or Do you know how to force the filter I have to increase its band pass ??

Bob KH2BR



--
Dave Bohlen


 
Edited

I have? radio number one that has only a ssb filter and it is strapped to the AM and CW position.

The problem with a ssb filter being used in CW is that strong stations near my operating frequency produce agc action and I have difficulty copying that weak cw station due to agc pumping. Thats why a cw filter is necessary. It? is very noticeable while there is a contest going on.

The radio number two has all 3 filters installed but the 250hz cw filter in the cw slot is to narrow. I like it but there are some guys that dont know how to zerobeat be so I dont hear them at all.?

I would never use a 250hz filter in AM mode, its to narrow.

The sotabeams filter works like a champ but you still suffer from agc action since it is hooked up to the earphone jack.

I have another FT301 arriving this week but it does not have the amplifier on the back
and the insides will be a mystery box with good or bad surprises.?

Bob KH2BR

?


 

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I undestand completly Bob. I have a 600 khz filter as I had mentioned. 25 bucks.. I have also RF decks if you wish to put it on the back of the one you have coming. Make sure it isn’t an SD. SD’s were a stripped down version and were only 10 watts. Those are valuable because you can run a Ukrainian kit ?tranverter off of them easily. They can be upgraded but it is a bit of work. I’d swap you a high power one for it if it’s an “SD”. The SD does not have the plug on the back for the RF deck to plug into. Well it does but is covered by a hard to find SD cover.
Good luck on the new one. I wouldn’t buy anything with a serial # earlier than 77 G xxxxxx . ’76 and real early 77’s had the early filter board among other things. Some of them work ok. 77G xxxxxx and on are the best ones.
73Dave

On Jun 3, 2024, at 4:36 PM, Robert Holsti via <kh2br.w6@...> wrote:

[Edited Message Follows]

I have? radio number one that has only a ssb filter and it is strapped to the AM and CW position.

The problem with a ssb filter being used in CW is that strong stations near my operating frequency produce agc action and I have difficulty copying that weak cw station due to agc pumping. Thats why a cw filter is necessary. It? is very noticeable while there is a contest going on.

The radio number two has all 3 filters installed but the 250hz cw filter in the cw slot is to narrow. I like it but there are some guys that dont know how to zerobeat be so I dont hear them at all.?

I would never use a 250hz filter in AM mode, its to narrow.

The sotabeams filter works like a champ but you still suffer from agc action since it is hooked up to the earphone jack.

I have another FT301 arriving this week but it does not have the amplifier on the back
and the insides will be a mystery box with good or bad surprises.?

Bob KH2BR

?


--
Dave Bohlen


 

It is a FT301 analog that needs the amp and is arriving thursday. It may need other things so I better wait so please reserve a 600hz filter for me and the amp if you have one. I could use my Juma amp if not. Here is my direct e$mail and you will have to
remove the ft301 from the start and end plus replace AT with the @ symbol and Dot with a period.

FT301rholstiATicloudDOTcomFt301? here is my p$hone number and the same thing?
remove ft301 from the start and end and remove the @ symbol.? FT3019516@439026FT301.
Thanks and 73's,
Bob KH2BR